Xinlandon has no "climate change" to speak of; every day and night are controlled by the artificial lights installed on the zenith. Particularly in the Downtown District, there's no simulated spring, summer, or autumn—only the unchanging monotony day after day. The only disruption came a while ago when a minor earthquake caused one of the large overhead lights to fall, crashing down onto a small building below. A family of three inside died instantly, creating a large "dark zone" in the city where light was lacking.